Jacobs



UNITED STATES PATENT OEEIcE,

ARMAND MULLER-JACOBS, OF NEW YORK, N. Y., ASSIGNOR TO THE UNIVERSAL COLOR COMPANY, OF NEW YORK.

PHOTOGRAPHlC REPRODUCTION.

SPECIFICATION forming part of Letters Patent No, 358.817, dated March 1, 1867.

Application filed November 27, 1886. Serial No. 220,095.

To all 1071 0112, it may concern.-

Be it known that I, ARMAND MULLER- JACOBS, a citizen of Switzerland, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Photographic Reproduction; and I do hereby declare the following to be a full, clear, and exact descrip tion ofthe invention, such as will enable others skilled in the art to which it appertains to make and use the same. v

This invention relates to reproduction by photography.

The object is in'a novel, expeditious, and effective manner to produce upon a hard surface snch as that of glass, porcelain, metal, a lithographic stone, or the like-a represen tation, view, picture, image, or ornament, so that the surface will itself present a representation, view, picture, image, or ornament, or that impressions of such can be taken therefrom by known printing methods.

The invention consists in preparing glass, porcelain, metals, lithographic stones, orother appropriate surfaces for production or reproduction by the application thereto of a solution of a resin-ate suitably strengthened, which after drying, after having portions of it exposed to light, and after being treated with a substance or with substances that will attack the portions which have been exposed to light, or will affect them, without attacking or affecting' the portions which have not been exposed to light, or with attack or action upon these in a less degree, or after being treated with a substance or with substances which will affect, attack, or remove the portions which have not been exposed to light, without affecting, attacking, or removing the portions which have been exposed to light, or with influence upon these in less degree, will present a representation, view, picture, image, or ornament, or a printingsurface thereof.

The invention also consists in an object having its surfaces so prepared.

In an application for patent upon a new process of photography,filed October 23, 1886,

I have announcedthat certain resinates not soluble in water by exposure to light change their properties as to solubility and as to re (No specimens.)

sistance to bleaching and oxidizing agents and acids. different resin-ates differing in degree of change. I have also stated that the resinates not readily soluble in water are soluble in benzole and various other hydrocarbons, in ether, chloroform, and bisulphide of carbon, and are almost indifferent to the action of bleaching agentssuch as hypochlorite of sodium; but that after exposure to light they become more or less insoluble in the abovenamed solvents, and are effected by the bleaching agents. I have also stated that the resinates are applied to the surfaces for use in solution in the solvents above named. I have also stated that the coating can be made more durable by the addition of caoutchouc, guitapercha, india-ruhber, or the solution in benzole of other suitable bodies to the resinate before the same is applied to the surface. I have also stated that when I Wish to produce the negative of an object I subject the prepared surface, alter suitable exposure, to the action of benzole, ether, bisulphide of carbon, chloroform, or other solvent, whereby those parts which have not been exposed to the action of light will be affected or removed without materially affecting the parts which have been exposed to light. I have also stated that when I wish to produce the positive of an object I subject the prepared surface, after exposure to light, to the action of hypochlorite of sodium, oxidizing agents, alkalies, or acids, which will affect those parts of the surface which have been exposed to light without materially affecting the parts which have not been so exposed.

By the present invention, when a surface suitable for etching, coated by a resinate dissolved in benzole, bisulphide of carbon, &c., to which has been added a solution of guttapercha, caoutchouc, rubber, or gums, &c., has been exposed in parts to light, either the portions which have not been exposed to light or those which have been exposed to light may be etched without materially affecting the others.

I find when, with the addition of caoutchouc or the like, I apply the method described in my application filed October 23, 1886, to produce a negative that the parts which have not a suitable resinate, by preference the resinate of magnesia, add to it a solution of gutta-percha or rubber, then coat the surface of the substance employed with the mixture, expose it in parts to light, as desired, then subject it to the action of hypochlorite ofsodium which affects-or removes the resinate where exposed to light, and then to the action of hydrofluoric acid, which thus more readily etches the parts which have been exposed to light than the others. I can also etch on glass, porcelain, or thelikeby followingthe methodjustdescribed, omitting the use of hypochlorite of sodium; but the former procedure is preferable, as by the latter the etching may not be so perfect.

By another method I coat and expose the surface as above, then subject it to the action of any solvent of the resinate and rubbersuch as a mixture of benzine and benzole-- which affects or removes the portion of the coat which has not been exposed to light, and then to the action of the acid, which thus more readily etches those parts which have not been exposed to light than the others.

Of course other surfaces such as metals, lithographic stones, &c.can be etched in the same manner by using the appropriate acids.

The solution which I have found best adapted for coating the surfaces is as follows: one per cent. 0 caoutchouc, fifteen per cent. of resinate of magnesia, and eighty-four per cent. of henzole.

In some instances I may prepare a printing surface without etching. To do this Ifind the following method preferable: I apply the coating of resinate and caoutchouc or the like and expose to light, as already described, and then subject the surface to the action of a solvent, by preference a mixture of benzole and ben zine. The photograph obtained may then be reproduced upon the application of fatty inks. Of course all the surfaces so produced, be they in intaglio or in relief, are susceptible of reproduction for multiplication by galvano-plastic or other well-known processes.

Having thus fully described my invention, what I claim as new, and desire to'secure by Letters Patent, is-

l. The process of preparing a hard surface in suitable condition to be etched or for use to yield an impression without being etched, which consists in coating the surface with a solution of a suitable resinate strengthened by caoutchouc or the like, subjecting it in parts then to the action of light, and then to the action of an agent which will affect some parts of the coating more than others, substantially as described.

2. The new process of etching, which consists i-n coating an appropriate surface with a suitable resinate strengthened by caoutchouc or the like, subjecting it then in parts to the action of light, then to the action of an agent which will affect some parts ofthe coating more than others, and then to the action of an etching substance, substantially as described.

3. The new process of etching, which consists in coating an appropriate surface with a suitable resinate strengthened by caoutchouc orthe like, subjecting it in parts to the action of light, and then directly to the action of an etching substance, substantially as described.

4. Areproducing surface composed ofasuitable resinate and caoutchouc or the like, substantially as set forth.

In testimony whereof Iaffix my signature in presence of two witnesses.

ARMAND M I ILLER JACO BS.

Witnesses:

It. G. DYRENFORTH, J AS. M. LEHMAIER. 

